Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf7c0486e2e76fb…

MALICIOUS

PDF

87.4 KB Created: 2021-03-15 16:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e98b19f0a1665d7de23f0fdede76d59e SHA-1: 6d8985f9a25a5ed91ce899a4fee7cab60f093688 SHA-256: baf7c0486e2e76fbd22ae6f308305615f70384f37afc812598b6f4102b51c97c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'lozipotod.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, suggests a lure related to educational psychology, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/aws?utm_term=what+are+the+theories+of+educational+psychology
    • http://storeeu.info/daffynition_decoder_5._3_worksheettqgty.pdf
    • https://cdn-cms.f-static.net/uploads/4371800/normal_6018840631e3c.pdf
    • http://getsol.xyz/xugagipopkuqs1.pdf
    • https://cdn-cms.f-static.net/uploads/4465565/normal_5fd23f86aaf0d.pdf
    • https://cdn-cms.f-static.net/uploads/4366982/normal_6046de70343f0.pdf
    • http://fitnesspack.net/33782368914q9e8e.pdf
    • https://static.s123-cdn-static.com/uploads/4416332/normal_5ffe52421facc.pdf
    • http://revershjtb.site/60218118100t48in.pdf
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5feb685b11ccf.pdf
    • http://kijomino.iblogger.org/67800583394.pdf
    • https://cdn-cms.f-static.net/uploads/4426572/normal_604d15f8eb04c.pdf
    • http://otshelnik.net/department_of_state_florida_annual_reportz315g.pdf
    • https://cdn-cms.f-static.net/uploads/4502248/normal_6034dd0c2b816.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5f28dd47-d6a8-4a08-8e6e-89f22b8318f2/best_monday_night_bars_in_atlanta.pdf
    • http://zisikatalim.epizy.com/nemowokuwepesemevirukoji.pdf
    • http://mimodiko.epizy.com/vadolami.pdf
    • http://rinivuwuvo.epizy.com/garaz.pdf
    • https://s3.amazonaws.com/kalanejaxutilif/limiwerot.pdf
    • https://s3.amazonaws.com/nelizenejakarug/chennai_express_movie_mp4_movies.pdf
    • https://s3.amazonaws.com/fuwenoxuzasila/english_worksheets_for_grade_3_adverbs.pdf
    • https://uploads.strikinglycdn.com/files/abda6a7d-de87-4dc1-81ee-8b9cdbaad20b/cake_bible_rose_levy_beranbaum_review.pdf
    • https://s3.amazonaws.com/gumagabu/cycling_helmet_fitting_guide.pdf
    • http://tuzipegubeluwo.epizy.com/28229932846.pdf
    • https://s3.amazonaws.com/zetubakuz/mi_play_store_apk.pdf
    • https://uploads.strikinglycdn.com/files/84cd461d-9d05-43cd-bee8-b1d7fa7aff2d/plan_y_programa_2011_tecnologia_informatica_secundaria.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117be.bin
1af27edce68f5d28d3cb52090cecc3e06ff7cb04b67d1c6fcfc3400119e386e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BE 5532 bytes
font_01_sfnt_off00012aa1.bin
c7d3ff02a949956d175b45537ffca76a355e08e4e4c4b7373bcef5cdab6fcf79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA1 10904 bytes

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